( 612 ) 



Myrmotherula surinamensis (sulisp. ?). 

 A few wrt/c.f ami s'w /'rutrili'x from >S. Javier auil Paniliilar are luost elosely 

 allied to what I consider typical J/. Ktiriiiamensis, but most of them are apparently 

 larger, with longer wings and stronger bills. The stripes on the throat and 

 breast of the males vary much in width. The fei/ialfs show that these birds 

 hflcmg to M. ,surinfinieii.vx (or a subspecies of the latter), and that they have 

 nothing to do with M. imdtostriafa, c/ierriei, and lonyicauda. There is apparently 

 some variation in the males of M. surinamensis, and I am not prepared to settle 

 the W. Ecnadorian form without more specimens of typical .V. surinamensis for 

 comparison (see Mov. Zool. llJUi. pp. 7:i, 73). 



Myrmothemla fulviventris viduata Hart. 



Mi/rmotheruht riduata Hartert, Nov. ZooL. lS9f>. j). 492 (? Cachavi). 



In 189s I described this form as " sp. nov." from tv^o females from Cachavi. I 

 then compared my new form with females of M. menetriesi, which I believed to be 

 nearest to it. We have since received both sexes of J/ fulvirentris (from Costa 

 Rica) and a series of males find females of my viduata, and I find that the latter has 

 nothing to do with M. menetriesi (the nnle of which has a nniform black throat and 

 breast), but is closely allied to M. fulrirentris, from which it dift'ers, however, as 

 follows : The upper surface (in both sexes) is more rufous, less olive, especially the 

 forehead and crown is much less greyish olive, and in fact of the same rnfons-brown 

 tinj;e as tlie back ; the lores are also less greyish, more rufous. In the males also the 

 breast is less tinged with ashy, and the females are more rufous underneath. (Cf. 

 Salvadori ct Festa, Boll. Mas. Zool. ed. Anat. comp. Torino xv. 1899. 29, and 

 csjK'cially Berlepsch's remark, I.e.') 



Cercomacra tyrannina (Scl.). 



I'l/riylena t)/raiuiina Scl., F. '/.. >>. l8.)r>. p. 9n (Bogotd). 



S. Javier and Pambilar. " Iris of adult males., females and young brown, bill 

 of iid nit 7«(7/(?« black, feet grey, bill of /'cwa/c»' and yonng above black, below light 

 grey, feet grey." The wings of the adult males are very long (77 to 781 mm.). 

 Birds from Costa Rica are perfectly similar in colour, but apparently smaller, while 

 the males from the Orinoco (cf. Nov. ZooL. 1902. p. 76) are generally much paler 

 above, and agree iu size with those from Costa Rica. There are probably several 

 subspecies to be distinguished. A good scries of Bogota liirds should be compared. 

 The young male is similar to the adult male, but much paler on the underside. 



{Cercomacra nigricans Scl.(= Pi/riglena maculicaudis Scl.) has been sent from 

 Pambilar.) 



Cercomacra berlepschi (Hart.). 



P>/riglena herlcpsclii Hart., Bull. B. 0. C, vii. p. xxix. (January 1898 : Cachavi); 

 Nov. Zool. 1898. p. 493. 



T/iamnophilmcar/iabiensisHskTt., Bull. B. 0. C. vii. p. xxix.-xxx. (January 1898: 

 Cachavi) : Nov. Zool. 1898. j). 491. 



